Hi Jeni,

> > The code above will get a nasty runtime error if a dir attribute
> > contains an illegal value. This leads to my favorite piece of code
> > which guards the invocation of the dynamically selected key by
> > having a key lookup in the stylesheet whether the key actually
> > exists.
> 
> Very sweet :) You could do the same kind of thing for decimal formats
> to use with format-number().
> 
> Of course the only slight drawback is that the document('') call will
> only get the current stylesheet document, and therefore won't search
> for keys defined in imported or included stylesheets (or indeed
> stylesheets in which this one is imported or included).

Couldn't you, potentially, write a called template which would recursively
open included or imported stylesheets and check in them as well?

> 
> Perhaps functions like key-available() and decimal-format-available()
> would be handy.

Certainly this would be easier, better and quicker.

	Steve

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